{"title":"Effect of prosthetic design and restorative material on the stress distribution of implant-supported 3-unit fixed partial dentures: 3D-FEA","authors":"Mohamed Ahmed, A. Hamdy, G. A. Fattah, A. Elfadl","doi":"10.4322/bds.2022.e3523","DOIUrl":"https://doi.org/10.4322/bds.2022.e3523","url":null,"abstract":"","PeriodicalId":37577,"journal":{"name":"Brazilian Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82699038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Erika Michele dos Santos Araújo, C. Vidal, A. Z. Freitas, N. Wetter, A. B. Matos
Objective: To compare optical, morphological, chemical, and physical aspects of the sound enamel and white spot lesions (WSL) classified as ICDAS 2. Material and Methods: Seventeen human molars with one surface presenting WSL and a sound surface (2 x 2 mm window) were characterized by Quantitative light-induced fluorescence (QLF ® ), Optical coherence tomography (OCT), microhardness, and Raman spectroscopy. The ANOVA and Tukey’s test were used at 5% significance level. Results: The QLF comparison between distinct substrates yielded decreased ∆ Q (integrated fluorescence loss) of -15,37%mm 2 and -11,68% ∆ F (fluorescence loss) for WSL. The OCT detected mean lesion depth of 174,43 µm. ANOVA could not detect differences in the optical attenuation coefficient between the substrates (p>0.05). Lower microhardness measures were observed in WSL than on sound enamel (p<0.05). The Raman spectra showed four vibrational phosphate bands (v1, v2, v3, v4), where the highest peak was at 960.3 cm -1 (v1) for both substrates. However, a 40% decrease in phosphate (v1) was detected in WSL. The peak at 1071 cm -1 was higher for sound enamel, indicating the presence of a phosphate band instead of the B-type carbonate. The spectra showed higher intensity of the organic composition at 1295 cm -1 and 1450 cm -1 for WSL. Conclusion: Non-invasive QLF, OCT and Raman spectroscopy were able to distinguish differences in fluorescence, optical properties, and organic/inorganic components, respectively, between sound enamel and WSL, validated by the destructive microhardness analysis.
目的:比较ICDAS 2级音牙釉质和白斑病变(WSL)的光学、形态学、化学和物理特征。材料和方法:采用定量光诱导荧光(QLF®)、光学相干层析成像(OCT)、显微硬度和拉曼光谱对17颗表面呈现WSL和声表面(2 x 2 mm窗口)的人磨牙进行了表征。采用方差分析和Tukey检验，显著性水平为5%。结果:不同底物之间的QLF比较显示，WSL的∆Q(综合荧光损失)下降了- 15.37% mm 2，∆F(荧光损失)下降了- 11.68%。OCT平均病变深度为174,43µm。单因素方差分析未发现不同基质间光衰减系数的差异(p>0.05)。牙釉质显微硬度低于正常牙釉质(p<0.05)。拉曼光谱显示出四个振动磷酸谱带(v1, v2, v3, v4)，其中两种底物的峰值都在960.3 cm -1 (v1)处。然而，在WSL中检测到磷酸盐(v1)减少40%。在1071 cm -1处的峰较高，表明存在磷酸盐带而不是b型碳酸盐。光谱显示，在1295 cm -1和1450 cm -1处，WSL的有机成分强度较高。结论:无创QLF、OCT和拉曼光谱能够分别区分健全牙釉质和WSL在荧光、光学性质和有机/无机成分方面的差异，并通过破坏性显微硬度分析得到验证。
{"title":"Characterization of sound enamel and natural white spot lesions","authors":"Erika Michele dos Santos Araújo, C. Vidal, A. Z. Freitas, N. Wetter, A. B. Matos","doi":"10.4322/bds.2022.e3488","DOIUrl":"https://doi.org/10.4322/bds.2022.e3488","url":null,"abstract":"Objective: To compare optical, morphological, chemical, and physical aspects of the sound enamel and white spot lesions (WSL) classified as ICDAS 2. Material and Methods: Seventeen human molars with one surface presenting WSL and a sound surface (2 x 2 mm window) were characterized by Quantitative light-induced fluorescence (QLF ® ), Optical coherence tomography (OCT), microhardness, and Raman spectroscopy. The ANOVA and Tukey’s test were used at 5% significance level. Results: The QLF comparison between distinct substrates yielded decreased ∆ Q (integrated fluorescence loss) of -15,37%mm 2 and -11,68% ∆ F (fluorescence loss) for WSL. The OCT detected mean lesion depth of 174,43 µm. ANOVA could not detect differences in the optical attenuation coefficient between the substrates (p>0.05). Lower microhardness measures were observed in WSL than on sound enamel (p<0.05). The Raman spectra showed four vibrational phosphate bands (v1, v2, v3, v4), where the highest peak was at 960.3 cm -1 (v1) for both substrates. However, a 40% decrease in phosphate (v1) was detected in WSL. The peak at 1071 cm -1 was higher for sound enamel, indicating the presence of a phosphate band instead of the B-type carbonate. The spectra showed higher intensity of the organic composition at 1295 cm -1 and 1450 cm -1 for WSL. Conclusion: Non-invasive QLF, OCT and Raman spectroscopy were able to distinguish differences in fluorescence, optical properties, and organic/inorganic components, respectively, between sound enamel and WSL, validated by the destructive microhardness analysis.","PeriodicalId":37577,"journal":{"name":"Brazilian Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75148328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Evaluation of the clinical effects of impacted lower third molar tooth on adjacent oral tissues","authors":"M. Etetafia, M. Obaroefe","doi":"10.4322/bds.2022.e3024","DOIUrl":"https://doi.org/10.4322/bds.2022.e3024","url":null,"abstract":"","PeriodicalId":37577,"journal":{"name":"Brazilian Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75680765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Raisa Castelo, M. M. Arnez, F. Curylofo-Zotti, S. Corona, T. C. Dotta, L. A. Almeida, A. Ramos, A. Catirse
{"title":"Effect of desensitizing dentifrices on eroded dentin wettability","authors":"Raisa Castelo, M. M. Arnez, F. Curylofo-Zotti, S. Corona, T. C. Dotta, L. A. Almeida, A. Ramos, A. Catirse","doi":"10.4322/bds.2022.e3432","DOIUrl":"https://doi.org/10.4322/bds.2022.e3432","url":null,"abstract":"","PeriodicalId":37577,"journal":{"name":"Brazilian Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74258771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
N. Zanini, Amanda Caramel-Juvino, P. Ana, D. Zezell
Santo André, SP, Brazil. ABSTRACT Background: The debonding of crowns and ceramic veneers with laser is already a reality in the clinic. It presents benefits in comparison to traditional removal with the use of a rotating instrument; however, there is still no consolidated protocol and many professionals use it without the necessary scientific basis. Objective: The aim of this work was to perform a literature review on the debonding of indirect ceramic restorations using the Er:YAG and Er,Cr:YSGG lasers to provide clinical professionals and the scientific community a careful analysis, and also to guiding the use of irradiation at laser for such procedures. Methods: Bibliographic searches were performed in the following databases: Pubmed, Web of Science and Google Scholar. According to the inclusion criteria adopted, twenty-seven clinical and in vitro studies were selected in the period from 2007 to 2021. In the present work, the composition of the crowns and facets, as well as the types of cement and the laser irradiation protocols adopted in the selected studies is detailed. Conclusions: It was concluded that the use of erbium lasers for debonding of indirect ceramic restorations proved to be more selective and conservative when compared to removal with a rotary diamond instrument. Furthermore, it was shown to be in more efficient in debonding different types of ceramics. However, there are great variations in the “debonding” protocols, which emphasizes the need for further studies that seek to standardize the irradiation protocols considering
圣安德罗，SP，巴西。摘要背景:应用激光对烤瓷牙冠和烤瓷牙贴面进行脱粘在临床上已经成为现实。与使用旋转仪器的传统去除相比，它提供了好处;然而，仍然没有统一的协议，许多专业人士在没有必要的科学依据的情况下使用它。目的:通过对Er:YAG和Er,Cr:YSGG激光间接陶瓷修复体脱粘的文献综述，为临床专业人员和科学界提供仔细的分析，并指导激光照射在这类手术中的应用。方法:在Pubmed、Web of Science和谷歌Scholar数据库中进行文献检索。根据采用的纳入标准，在2007 - 2021年期间选择了27项临床和体外研究。在目前的工作中，冠和切面的组成，以及水泥的类型和所选研究中采用的激光照射方案都是详细的。结论:与旋转金刚石器械去除相比，使用铒激光去除间接陶瓷修复体被证明更具选择性和保守性。此外，它还被证明在不同类型的陶瓷中具有更高的脱粘效率。然而，在“脱粘”方案中存在很大的差异，这强调需要进一步研究以寻求标准化所考虑的辐照方案
{"title":"Erbium laser in the debonding of ceramics: a literature review","authors":"N. Zanini, Amanda Caramel-Juvino, P. Ana, D. Zezell","doi":"10.4322/bds.2022.e3154","DOIUrl":"https://doi.org/10.4322/bds.2022.e3154","url":null,"abstract":"Santo André, SP, Brazil. ABSTRACT Background: The debonding of crowns and ceramic veneers with laser is already a reality in the clinic. It presents benefits in comparison to traditional removal with the use of a rotating instrument; however, there is still no consolidated protocol and many professionals use it without the necessary scientific basis. Objective: The aim of this work was to perform a literature review on the debonding of indirect ceramic restorations using the Er:YAG and Er,Cr:YSGG lasers to provide clinical professionals and the scientific community a careful analysis, and also to guiding the use of irradiation at laser for such procedures. Methods: Bibliographic searches were performed in the following databases: Pubmed, Web of Science and Google Scholar. According to the inclusion criteria adopted, twenty-seven clinical and in vitro studies were selected in the period from 2007 to 2021. In the present work, the composition of the crowns and facets, as well as the types of cement and the laser irradiation protocols adopted in the selected studies is detailed. Conclusions: It was concluded that the use of erbium lasers for debonding of indirect ceramic restorations proved to be more selective and conservative when compared to removal with a rotary diamond instrument. Furthermore, it was shown to be in more efficient in debonding different types of ceramics. However, there are great variations in the “debonding” protocols, which emphasizes the need for further studies that seek to standardize the irradiation protocols considering","PeriodicalId":37577,"journal":{"name":"Brazilian Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74033386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lucas Peixoto de Araújo, W. L. O. Rosa, Lucas Pinto Carpena, Larissa Moreira Pinto, Luiz Antônio Soares Falson, Nádia de Souza Ferreira, E. L. Sousa
{"title":"Intentional foraminal enlargement: a systematic review with bibliometric analysis","authors":"Lucas Peixoto de Araújo, W. L. O. Rosa, Lucas Pinto Carpena, Larissa Moreira Pinto, Luiz Antônio Soares Falson, Nádia de Souza Ferreira, E. L. Sousa","doi":"10.4322/bds.2022.e3506","DOIUrl":"https://doi.org/10.4322/bds.2022.e3506","url":null,"abstract":"","PeriodicalId":37577,"journal":{"name":"Brazilian Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85419808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nermin Ahmed Abd El Gawwad. Omaima Salah El Din El Mahallawi, G. Naggar
{"title":"Assessment of lateral and vertical tissue displacement obtained by the retraction cord and the Magic Foam® paste: a randomized controlled clinical trial","authors":"Nermin Ahmed Abd El Gawwad. Omaima Salah El Din El Mahallawi, G. Naggar","doi":"10.4322/bds.2022.e3294","DOIUrl":"https://doi.org/10.4322/bds.2022.e3294","url":null,"abstract":"","PeriodicalId":37577,"journal":{"name":"Brazilian Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79734676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Lessa, C. Patussi, Carolina Ferrairo Danieletto Zanna, L. Sassi, G. Z. Ferreira
{"title":"How can the dental surgeon promote oral health in patients submitted to chemotherapy?","authors":"M. Lessa, C. Patussi, Carolina Ferrairo Danieletto Zanna, L. Sassi, G. Z. Ferreira","doi":"10.4322/bds.2022.e3013","DOIUrl":"https://doi.org/10.4322/bds.2022.e3013","url":null,"abstract":"","PeriodicalId":37577,"journal":{"name":"Brazilian Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81371840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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